n=int(input())
for i in range(8):
    if 1800-200*i<=n<2000-100*i:
        print(i+1)
        break n=int(input()) n int(input()) int input() input for i in range(8):
    if 1800-200*i<=n<2000-100*i:
        print(i+1)
        break i range(8) range 8 if 1800-200*i<=n<2000-100*i:
        print(i+1)
        break 1800-200*i<=n<2000-100*i 1800-200*i<=n 1800-200*i 1800 200*i 200 i n 2000-100*i 2000 100*i 100 i print(i+1) print i+1 i 1 break n=int(input()) int(input()) n
n=int(input())
for i in range(8):
    if 1800-200*i<=n<2000-100*i:
        print(i+1)
        break